Joint surface replacement system
AssigneeAccufix Surgical, Inc.
InventorsGlenn C. Vitale, Michael Parisi, Wayne Conlan
Life of this patent
Estimating the term…
Abstract
The present invention relates to an articular joint replacement system. The system has first and second components. Each component has a tapered head piece for covering the end of a bone and for acting as an articular surface, an integrally formed screw stem having a length sufficient to extend into the medullary canal, and inwardly angled bone grips affixed to the underside of the head piece to allow solid fixation to the bone by compression press fit. The head piece of the first component is provided with a shaped exterior surface which complements the shaped exterior surface of the head piece of the second component and which allows motion in three planes.
Claims20
A reamer tool apparatus for articular surface replacement comprising:
- a one-piece instrument having a shank with a first end and a second end residing between a longitudinal length of the shank;
- one or more staged blades residing at the second end of the shank and extending laterally away from the shank, each staged blade having a first blade portion for countersinking articular bone and a second blade portion for surface grinding bone of the articular surface simultaneously in a single step.
A reamer tool apparatus for prepping bone for insertion of a screw component in articular surface replacement comprising:
- a one-piece instrument having a shank with a longitudinal length and first and second ends at opposite ends of the longitudinal length;
- a plurality of staged blades residing at the second end of the shank of the one-piece instrument, each said staged blade extending laterally away from the shank and having a first blade portion configured to countersink articular bone and a second blade portion configured to surface grind bone of the articular surface simultaneously within a single step using the one-piece instrument, the first blade portions reside laterally closer to the shank as compared to the second blade portions.
A method for prepping bone for articular surface replacement comprising:
- providing a one-piece instrument having a shank and one or more staged double blades at an end thereof, each said staged double blade extending laterally away from the shank and having a first blade portion configured to countersink articular bone and a second blade portion configured to surface grind bone of the articular surface simultaneously within a single step, each first blade portion residing laterally closer to the shank as compared to each second blade portion;
- rotating the one-piece instrument while making contact with the bone;
- and
- reaming the bone using the one-piece instrument to simultaneously countersink via the first blade portion and surface grind via the second blade portion within a single step to provide two different reamed depths within the bone.
Dependencies are inferred from the claim text.